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Finding the Fourth Proportional to 490,681,976.80, 735,397,774.80 and 260,761,208.80

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Solution

The fourth proportional to 490,681,976.80, 735,397,774.80 and 260,761,208.80 is: 390,809,570.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,681,976.80 : 735,397,774.80 = 260,761,208.80 : x
  2. Step 2: Convert to fraction form
    490,681,976.80/735,397,774.80 = 260,761,208.80/x
  3. Step 3: Cross multiply
    490,681,976.80x = 735,397,774.80 × 260,761,208.80
  4. Step 4: Simplify right side
    490,681,976.80x = 191,763,212,705,678,176
  5. Step 5: Solve for x
    x = 191,763,212,705,678,176/490,681,976.80
  6. Step 6: Final answer
    x = 390,809,570.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.